Multicylinder pump



' Jan. 8, 1929.

w. L. COURSEN MULTIGYLINDER PUMP' Original Fi1ed Feb. 11, 1927 Patented J 8,

UNITED S ATES PATENTiOFFlCI-E.

WALTER: L. counsE OE NEw nocE LLE, NEW ORK, ASSIGNOR 'ro 'rUnIzE ARTI- EIOIAL snzx. COMPANY or AMERICA, A CORPORATION OE DELAWARE.

MULTICYLINDEB PUMP.

Application filed February. 11, 1927. Serial No. 167,437. Renewed June 16, 1928. I

p My invention relates to multicylinder pumps of the general type in which a rotating cylindrical body enclosed in a cylindrical casing is provided with a series of cylinders in which pistons are caused :to reci rocate as.

the cylindrical body is revolved in t 1e casing. In another application filed b me J anuary- 11, 1927, Serial No. 160,373, I ave described and shown an improved pump of this general type in which Ihave provided for the lubrication of the moving parts by thefiuid passing through the pump and for the balanced pressures existing inthe ump by certain novel features of construction which are broadly claimed in the said pending application, my present application being for the specific purpose of covering a special form of pump embodying improvements broadly covered in my said application. My inventions, both as described in my said former application and in the present case, have sp cial reference to pumps-adapted for use in p mping viscous fluids such as viscose Y and intro-cellulose collodion 1n connect on with the spinning mechanism by which such fluids are forced through spinnerettes to form artificial silk filaments, though of course my pumps can be usefully applied for the ordinary purpose of 1pumps in general.

The nature 0 my improvements -will be best understood as described in connection with the drawings, in which Figure l isa sectional longitudinal elevation of my pump taken as on the section line 11 of Fig. 2.

Figure 2 is a cross section on the line 2-2 of Fig. 1.

Figure 3 a cross section on the linc'3-3 of Fig. 1, and 40 Figure 1 an end view of the left hand end of the pump shown in Fig. 1. v

A is a casing formed with a cylindrical bore A and with suction and deliver hers A? and A opening into the cylindrical bore intermediate its ends, as indicated in the drawings. A is an open faced conduitconnecting the chamberA with the left hand and of the casing and A, a similar open faced conduit connecting the chamber A with the right hand end of the casing. .13 and B are chambers formed at the end of the casing with which the-conduits A and J A connect and to which are also connected,

chamleft hand end of the casing and formed,-as 1 shown, with the cylindrical inner surface C; D is 'a supplemental end plate fitting against the outer edge of the end plate C and having a threaded extension indicated at D and an internally threaded central perforation indicated at D The end plates are secured together and to the end of the casing by bolts, as indicated at E. F isan annulus internally threaded and screwing on the threaded extension D, the outer aunular surface of which makes a fit with the cylindrical surface C This annulus has an extension F extending into'the chamber B and supporting a helical cam, indicated at F. f and the right hand end of the casing and held in place by bolts indicated at I and, as shown, this plate isformed with an externally threaded stuffing box extension H in which fits a gland H adjusted by means of the nut f are openings formed through the extension F to afford communication be- H screwing. on the threaded stufiing box as Indicated. H is an abutment for the end of the rotating body J, extendin into the chamber B J is a cylindrical body fitting in the cylindrical bore of the casing, having, as shown, a cylindrical extension J roj ecting into the chamber B and a drive s aft J 2 extendin through the stuflingbox in the end plate is connected, as for instance a gear wheel M. J J etc. are c linders formed in the re tatin body J an opening into the left hand cham er B but not into the right hand -cham-- bcr B The inner ends of these cylinders are connected by radial ports J with the surface of the cylindricalbody J at points where they will register as the: body revolves'with suction and delivery orts-A and A. 'J is a central perforation (named in the extension J. K is aheaded pin fitted in the perfora- Hand to which driving mechanism tion J against the end of which abuts the tons working in the cylinders J and having heads indicated at L, which are shaped to 'fit on eachside of the helical cam, F so that as the body ,J revolves, the pistons will be reciprocated in the cylinders J Ineration .fluidentering, for instance,

' casing with a cylindrical bore, a chamber at each end thereof, inlet and outlet ports con- 40 throng the port A? enters the chamber B, from which it passesto theopen faced port A, coming in contact with the surface of the rotating body J into the suction chamber A; thence the fluid pames through the ports J 5 into the ends of the cylinders J during the suction strokes ofthe pistons and thence again through the ports J 5. it passes to the chamber A and the open faced condultpassage A into the end chamber B and thence through the delivery port A.

' be obvious that all the moving parts, both in- It will be understood that the pump pistons are actuated by the revolution of the cylindrical body J and by the action on the heads of the pistons of the cam F and it will the chambers B and B are constantly lubricated by the flowing fluid being pumped and that the entire length of the rotating cylindrical bodyJ is constantly being lubricated by the fluid flowing through the open faced pistons A and A". Another feature of my construction is'that the end thrust on the rotating cylindrical body J is only the diflerence in pressure existing in the chambers B and B, which difference is not ordinarily Having now described my invention, wh t I claim as new and desire to-secure by Letters Patent is: I

A multiple cylinder pump comprising a nected one with each chamber, suction and delivery chambers lying opposite to each other and opening into the cylindrical bore and open faced channels connecting said chambers one to each end chamber of the cylinders formed therein opening through one end of the cylindrical body but not through the other end thereof, and ports extending radially from said cylinders and registering with the suction and delivery chambers of the casing, pistons working in the cylinders and extending. into the end chamber into which said cylinders open, a cam for reciprocating the. pistons located in. the end chamber into which their ends extend and means also located in said end chamber for maintaining contact of the pistons and cam.

WALTER L. COURSEN. 

